This Halloween, skip the store-bought costumes and make your own. Many disposable costumes are made with polyvinyl chloride (PVC) and often painted with toxic paints and dyes. Be creative instead. Rummage through your own closets or thrift stores for more affordable, unique costumes you can put together yourself. Making your own costume also guarantees that you'll have something one-of-a-kind instead of a look that's mass-produced.